In the past two decades, the U.S. public has become noticeably more politically polarized. Recent analyses of this co-voting data have found that the network summaries like modularity and co-voting propensities within and between parties reflect the onset of this polarization [1]}, [2]}, [3]}, [4]}. In this study, we sought to characterize the differences of the Senate co-voting behavior during the “polarization” era from their behavior in the “non-polarized” era. Such an analysis could provide a deeper understanding of the relationships among senators in these two eras.
